Hey Jan, I had one for the longest time as well, being part of an airfix group build made me do this one in a jiff.
I don't know the size of the wire insulation, I just got 2 different sizes I found in my spares box, I think the smaller one is about 1mm diameter.
The 2 main things that really needed work are the support plates (drill out the holes and thin the plates) and the seats.
Otherwise the whole thing builds nicely into a delicate piece of anti-aircraft history
